CONTENTS.

PAGE

1. On the Northern Drift, as it is developed on the Southern

Shore of the Moray Frith. By Mr JOHN MARTIN, of

Anderson's Institution, Elgin,

2. On the Transition-Beds from the Upper Silurians into

the Old Red Sandstone, and from the Old Red Sand-

stone into the Carboniferous Rocks, in Herefordshire

and Gloucestershire. By the Rev. W. S. SYMONDS,

F.G.S.,

3. Some Remarks on the Storm of 6th and 7th February

1856. By R. RUSSELL, Kilwhiss, Fife. (Plates IV.,

V.),

4. On the Preparation of Sugar and Arrack from Palms in

Ceylon. By ALEXANDER SMITH, M.D., Staff-Surgeon,

2d Class. Communicated by the Director-General of

the Army Medical Department,

5. On the Animalcules and other Organized Bodies which

give a Red Colour to the Sea. By M. CAMILLE

DARESTE. (Translated from Annales des Sciences.

Naturelles),

209

239

243

253

262

6. Description of a new species of Echeneis (E. tropicus);—

and of a new Lernean of the genus Penella (P. re-

mora), infesting the Echeneis remora; with some re-

marks on the economy of the Remora. By ANDREW

MURRAY, Edinburgh,

7. On the Discovery of Paradoxides in the Altered Rocks

of Eastern Massachusetts. By Professor WILLIAM B.

ROGERS, F.G. S., &c.,

8. On the Lignites of the Giant's Causeway and the Isle of

Mull. By ROBERT HARKNESS, F.R.SS.L. & E., F.G.S.,

Professor of Geology; and JOHN BLYTH, M.D., F.C.S.,

Professor of Chemistry, Queen's College, Cork.

(Plate VI.),

9. Description of Two Tubicolar Animals. By T. STRE-

THILL WRIGHT, M.D., F.R.C.P.E. (Plate VII.),

10. On the existence of Thread-Cells on the Tentacles of

Cydippe. By T. STRETHILL WRIGHT, M.D., &c.,

11. On the Terraces in the Valley of the Tay, north of Dun-

keld. By H. C. SORBY, F.G.S.,

PAGE

287

301

304

313

316

317

1. Researches on Colour-Blindness, with a Supplement, on

the Danger attending the present system of Railway

and Marine Coloured Signals. By GEORGE WILSON,

M.D., F.R.S.E., Regius Professor of Technology in

the University of Edinburgh; and Director of the In-

dustrial Museum of Scotland,

322

1. On the Composition of the Muscles in the Animal Series.

2. On the Nature of the Involuntary Muscular

Fibres. 3. On the Electricity of Muscles. 4. Fos-
sil Apes. 5. A new Species of Turkey from Mexico,
367-372

BOTANY.

6. Value of Meteorological Observations as regards the Dis-

tribution of Plants. 7. Progressive Development.

8. Notice of the Vegetation of Pichincha. 9. Hairs

in Oleace and Jasminaceæ. 10. Temperature of

Flower of Victoria regia. 11. Effect of Salt Water

on Seeds. 12. The oblique direction of the Ligneous

Fibre, and the Twist of the Trunks of Trees occa-

sioned thereby. 13. Notes on Loganiaceae.

of Plants in the Economy of Nature.

triticoides,

14. Use

15. Ægilops

372-379

CHEMISTRY.

16. Ozone. 17. On the Detection of Phosphorus in Cases

of Poisoning,

379-381

PHYSICAL GEOGRAPHY,

18. On the Inland Sea of Central Africa,

PAGB

382

MISCELLANEOUS.

19. African Tribes. 20. On the Action of Urari and Strych-

nia on the Animal Economy. 20. Detection of

Strychnia. 21. Deaths: William Yarrell-Dr Buck-

land-Sir Richard Westmacott-Sir John Ross-

Erratum.-Page 206, line 28, for Crowe, read Crum.

389

THE

EDINBURGH NEW

PHILOSOPHICAL JOURNAL.

An Account of some Experiments on certain Sea-Weeds of an Edible kind. By JOHN DAVY, M.D., F.R.SS. Lond. & Ed., &c.

The subjects of the experiments I am about to give an account of have been four, Carrigeen Moss (Chondrus crispus), Dulse or Dylisk (Rhodomenia palmata), Sloke or Laver (Porphyra laciniata), Tangle (Laminaria digitata), Doughlaghman (Fucus vesiculosus).

The results I have obtained are fewer and more imperfect than I could wish; I can offer them only as a small contribution, with the hope that they may induce others more favourably situated to engage in and extend the inquiry concerning a class of substances which certainly have not yet received the degree of attention they deserve, especially from the analytical chemist.

1. Of Carrigeen Moss (Chondrus crispus).

That which I have examined has been from Ireland, and in its bleached state,-the state in which it is sent into the market, and is coming into use for the purpose of feeding stock.

It is of a light-yellowish hue, of a crisp feel, and of a faint peculiar flavour, without saltness, having been steeped and washed in fresh water preparatory to bleaching.

NEW SERIES.-VOL. IV. NO. 1.-JULY 1856.

A